1 # This file is part of NIT ( http://www.nitlanguage.org ).
3 # Copyright 2012 Jean Privat <jean@pryen.org>
5 # Licensed under the Apache License, Version 2.0 (the "License");
6 # you may not use this file except in compliance with the License.
7 # You may obtain a copy of the License at
9 # http://www.apache.org/licenses/LICENSE-2.0
11 # Unless required by applicable law or agreed to in writing, software
12 # distributed under the License is distributed on an "AS IS" BASIS,
13 # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 # See the License for the specific language governing permissions and
15 # limitations under the License.
17 # Analysis and verification of property definitions to instantiate model element
18 module modelize_property
20 intrude import modelize_class
21 private import annotation
23 redef class ToolContext
24 # Run `AClassdef::build_property` on the classdefs of each module
25 var modelize_property_phase
: Phase = new ModelizePropertyPhase(self, [modelize_class_phase
])
28 private class ModelizePropertyPhase
30 redef fun process_nmodule
(nmodule
)
32 for nclassdef
in nmodule
.n_classdefs
do
33 if nclassdef
.all_defs
== null then continue # skip non principal classdef
34 toolcontext
.modelbuilder
.build_properties
(nclassdef
)
39 redef class ModelBuilder
40 # Registration of the npropdef associated to each mpropdef.
42 # Public clients need to use `mpropdef2node` to access stuff.
43 private var mpropdef2npropdef
= new HashMap[MPropDef, APropdef]
45 # Retrieve the associated AST node of a mpropertydef.
46 # This method is used to associate model entity with syntactic entities.
48 # If the property definition is not associated with a node, returns `null`.
49 fun mpropdef2node
(mpropdef
: MPropDef): nullable ANode
52 res
= mpropdef2npropdef
.get_or_null
(mpropdef
)
54 # Run the phases on it
55 toolcontext
.run_phases_on_npropdef
(res
)
58 if mpropdef
isa MMethodDef and mpropdef
.mproperty
.is_root_init
then
59 res
= mclassdef2nclassdef
.get_or_null
(mpropdef
.mclassdef
)
60 if res
!= null then return res
65 # Retrieve all the attributes nodes localy definied
66 # FIXME think more about this method and how the separations separate/global and ast/model should be done.
67 fun collect_attr_propdef
(mclassdef
: MClassDef): Array[AAttrPropdef]
69 var res
= new Array[AAttrPropdef]
70 var n
= mclassdef2nclassdef
.get_or_null
(mclassdef
)
71 if n
== null then return res
72 for npropdef
in n
.n_propdefs
do
73 if npropdef
isa AAttrPropdef then
74 # Run the phases on it
75 toolcontext
.run_phases_on_npropdef
(npropdef
)
82 # Build the properties of `nclassdef`.
83 # REQUIRE: all superclasses are built.
84 private fun build_properties
(nclassdef
: AClassdef)
86 # Force building recursively
87 if nclassdef
.build_properties_is_done
then return
88 nclassdef
.build_properties_is_done
= true
89 var mclassdef
= nclassdef
.mclassdef
.as(not null)
90 if mclassdef
.in_hierarchy
== null then return # Skip error
91 for superclassdef
in mclassdef
.in_hierarchy
.direct_greaters
do
92 if not mclassdef2nclassdef
.has_key
(superclassdef
) then continue
93 build_properties
(mclassdef2nclassdef
[superclassdef
])
96 mclassdef
.build_self_type
(self, nclassdef
)
97 for nclassdef2
in nclassdef
.all_defs
do
98 for npropdef
in nclassdef2
.n_propdefs
do
99 npropdef
.build_property
(self, mclassdef
)
101 for npropdef
in nclassdef2
.n_propdefs
do
102 npropdef
.build_signature
(self)
104 for npropdef
in nclassdef2
.n_propdefs
do
105 npropdef
.check_signature
(self)
108 process_default_constructors
(nclassdef
)
111 # the root init of the Object class
112 # Is usually implicitly defined
113 # Then explicit or implicit definitions of root-init are attached to it
114 var the_root_init_mmethod
: nullable MMethod
116 # Introduce or inherit default constructor
117 # This is the last part of `build_properties`.
118 private fun process_default_constructors
(nclassdef
: AClassdef)
120 var mclassdef
= nclassdef
.mclassdef
.as(not null)
122 # Are we a refinement
123 if not mclassdef
.is_intro
then return
125 # Look for the init in Object, or create it
126 if mclassdef
.mclass
.name
== "Object" and the_root_init_mmethod
== null then
127 # Create the implicit root-init method
128 var mprop
= new MMethod(mclassdef
, "init", mclassdef
.mclass
.visibility
)
129 mprop
.is_root_init
= true
130 var mpropdef
= new MMethodDef(mclassdef
, mprop
, nclassdef
.location
)
131 var mparameters
= new Array[MParameter]
132 var msignature
= new MSignature(mparameters
, null)
133 mpropdef
.msignature
= msignature
134 mpropdef
.new_msignature
= msignature
136 nclassdef
.mfree_init
= mpropdef
137 self.toolcontext
.info
("{mclassdef} gets a free empty constructor {mpropdef}{msignature}", 3)
138 the_root_init_mmethod
= mprop
142 # Is the class forbid constructors?
143 if not mclassdef
.mclass
.kind
.need_init
then return
145 # Is there already a constructor defined?
146 var defined_init
: nullable MMethodDef = null
147 for mpropdef
in mclassdef
.mpropdefs
do
148 if not mpropdef
isa MMethodDef then continue
149 if not mpropdef
.mproperty
.is_init
then continue
150 if mpropdef
.mproperty
.is_root_init
then
151 assert defined_init
== null
152 defined_init
= mpropdef
153 else if mpropdef
.mproperty
.name
== "init" then
154 # An explicit old-style init named "init", so return
159 if not nclassdef
isa AStdClassdef then return
161 # Collect undefined attributes
162 var mparameters
= new Array[MParameter]
163 var initializers
= new Array[MProperty]
164 for npropdef
in nclassdef
.n_propdefs
do
165 if npropdef
isa AMethPropdef then
166 if npropdef
.mpropdef
== null then return # Skip broken attribute
167 var at
= npropdef
.get_single_annotation
("autoinit", self)
168 if at
== null then continue # Skip non tagged init
170 var sig
= npropdef
.mpropdef
.msignature
171 if sig
== null then continue # Skip broken method
173 if not npropdef
.mpropdef
.is_intro
then
174 self.error
(at
, "Error: `autoinit` cannot be set on redefinitions")
178 for param
in sig
.mparameters
do
179 var ret_type
= param
.mtype
180 var mparameter
= new MParameter(param
.name
, ret_type
, false)
181 mparameters
.add
(mparameter
)
183 initializers
.add
(npropdef
.mpropdef
.mproperty
)
185 if npropdef
isa AAttrPropdef then
186 if npropdef
.mpropdef
== null then return # Skip broken attribute
187 if npropdef
.noinit
then continue # Skip noinit attribute
188 var atautoinit
= npropdef
.get_single_annotation
("autoinit", self)
189 if atautoinit
!= null then
190 # For autoinit attributes, call the reader to force
191 # the lazy initialization of the attribute.
192 initializers
.add
(npropdef
.mreadpropdef
.mproperty
)
195 if npropdef
.has_value
then continue
196 var paramname
= npropdef
.mpropdef
.mproperty
.name
.substring_from
(1)
197 var ret_type
= npropdef
.mpropdef
.static_mtype
198 if ret_type
== null then return
199 var mparameter
= new MParameter(paramname
, ret_type
, false)
200 mparameters
.add
(mparameter
)
201 var msetter
= npropdef
.mwritepropdef
202 if msetter
== null then
203 # No setter, it is a old-style attribute, so just add it
204 initializers
.add
(npropdef
.mpropdef
.mproperty
)
206 # Add the setter to the list
207 initializers
.add
(msetter
.mproperty
)
212 if the_root_init_mmethod
== null then return
214 # Look for most-specific new-stype init definitions
215 var spropdefs
= the_root_init_mmethod
.lookup_super_definitions
(mclassdef
.mmodule
, mclassdef
.bound_mtype
)
216 if spropdefs
.is_empty
then
217 toolcontext
.error
(nclassdef
.location
, "Error: {mclassdef} does not specialize {the_root_init_mmethod.intro_mclassdef}. Possible duplication of the root class `Object`?")
221 # Search the longest-one and checks for conflict
222 var longest
= spropdefs
.first
223 if spropdefs
.length
> 1 then
224 # Check for conflict in the order of initializers
225 # Each initializer list must me a prefix of the longest list
226 # part 1. find the longest list
227 for spd
in spropdefs
do
228 if spd
.initializers
.length
> longest
.initializers
.length
then longest
= spd
231 for spd
in spropdefs
do
233 for p
in spd
.initializers
do
234 if p
!= longest
.initializers
[i
] then
235 self.error
(nclassdef
, "Error: conflict for inherited inits {spd}({spd.initializers.join(", ")}) and {longest}({longest.initializers.join(", ")})")
243 # Can we just inherit?
244 if spropdefs
.length
== 1 and mparameters
.is_empty
and defined_init
== null then
245 self.toolcontext
.info
("{mclassdef} inherits the basic constructor {longest}", 3)
246 mclassdef
.mclass
.root_init
= longest
250 # Combine the inherited list to what is collected
251 if longest
.initializers
.length
> 0 then
252 mparameters
.prepend longest
.new_msignature
.mparameters
253 initializers
.prepend longest
.initializers
256 # If we already have a basic init definition, then setup its initializers
257 if defined_init
!= null then
258 defined_init
.initializers
.add_all
(initializers
)
259 var msignature
= new MSignature(mparameters
, null)
260 defined_init
.new_msignature
= msignature
261 self.toolcontext
.info
("{mclassdef} extends its basic constructor signature to {defined_init}{msignature}", 3)
262 mclassdef
.mclass
.root_init
= defined_init
266 # Else create the local implicit basic init definition
267 var mprop
= the_root_init_mmethod
.as(not null)
268 var mpropdef
= new MMethodDef(mclassdef
, mprop
, nclassdef
.location
)
269 mpropdef
.has_supercall
= true
270 mpropdef
.initializers
.add_all
(initializers
)
271 var msignature
= new MSignature(mparameters
, null)
272 mpropdef
.new_msignature
= msignature
273 mpropdef
.msignature
= new MSignature(new Array[MParameter], null) # always an empty real signature
274 nclassdef
.mfree_init
= mpropdef
275 self.toolcontext
.info
("{mclassdef} gets a free constructor for attributes {mpropdef}{msignature}", 3)
276 mclassdef
.mclass
.root_init
= mpropdef
279 # Check the visibility of `mtype` as an element of the signature of `mpropdef`.
280 fun check_visibility
(node
: ANode, mtype
: MType, mpropdef
: MPropDef)
282 var mmodule
= mpropdef
.mclassdef
.mmodule
283 var mproperty
= mpropdef
.mproperty
285 # Extract visibility information of the main part of `mtype`
286 # It is a case-by case
287 var vis_type
: nullable MVisibility = null # The own visibility of the type
288 var mmodule_type
: nullable MModule = null # The original module of the type
289 mtype
= mtype
.as_notnullable
290 if mtype
isa MClassType then
291 vis_type
= mtype
.mclass
.visibility
292 mmodule_type
= mtype
.mclass
.intro
.mmodule
293 else if mtype
isa MVirtualType then
294 vis_type
= mtype
.mproperty
.visibility
295 mmodule_type
= mtype
.mproperty
.intro_mclassdef
.mmodule
296 else if mtype
isa MParameterType then
297 # nothing, always visible
299 node
.debug
"Unexpected type {mtype}"
303 if vis_type
!= null then
304 assert mmodule_type
!= null
305 var vis_module_type
= mmodule
.visibility_for
(mmodule_type
) # the visibility of the original module
306 if mproperty
.visibility
> vis_type
then
307 error
(node
, "Error: The {mproperty.visibility} property `{mproperty}` cannot contain the {vis_type} type `{mtype}`")
309 else if mproperty
.visibility
> vis_module_type
then
310 error
(node
, "Error: The {mproperty.visibility} property `{mproperty}` cannot contain the type `{mtype}` from the {vis_module_type} module `{mmodule_type}`")
315 # No error, try to go deeper in generic types
316 if node
isa AType then
317 for a
in node
.n_types
do
319 if t
== null then continue # Error, thus skipped
320 check_visibility
(a
, t
, mpropdef
)
322 else if mtype
isa MGenericType then
323 for t
in mtype
.arguments
do check_visibility
(node
, t
, mpropdef
)
329 # Does the MPropDef contains a call to super or a call of a super-constructor?
330 # Subsequent phases of the frontend (esp. typing) set it if required
331 var has_supercall
: Bool = false is writable
334 redef class AClassdef
335 # Marker used in `ModelBuilder::build_properties`
336 private var build_properties_is_done
= false
338 # The free init (implicitely constructed by the class if required)
339 var mfree_init
: nullable MMethodDef = null
343 # The base init of the class.
344 # Used to get the common new_msignature and initializers
346 # TODO: Where to put this information is not clear because unlike other
347 # informations, the initialisers are stable in a same class.
348 var root_init
: nullable MMethodDef = null
351 redef class MClassDef
352 # What is the `APropdef` associated to a `MProperty`?
353 # Used to check multiple definition of a property.
354 var mprop2npropdef
: Map[MProperty, APropdef] = new HashMap[MProperty, APropdef]
356 # Build the virtual type `SELF` only for introduction `MClassDef`
357 fun build_self_type
(modelbuilder
: ModelBuilder, nclassdef
: AClassdef)
359 if not is_intro
then return
362 var mprop
= modelbuilder
.try_get_mproperty_by_name
(nclassdef
, self, name
)
364 # If SELF type is declared nowherer?
365 if mprop
== null then return
367 # SELF is not a virtual type? it is weird but we ignore it
368 if not mprop
isa MVirtualTypeProp then return
370 # Is this the intro of SELF in the library?
371 var intro
= mprop
.intro
372 var intro_mclassdef
= intro
.mclassdef
373 if intro_mclassdef
== self then
374 var nintro
= modelbuilder
.mpropdef2npropdef
[intro
]
376 # SELF must be declared in Object, otherwise this will create conflicts
377 if intro_mclassdef
.mclass
.name
!= "Object" then
378 modelbuilder
.error
(nintro
, "Error: the virtual type SELF must be declared in Object.")
381 # SELF must be public
382 if mprop
.visibility
!= public_visibility
then
383 modelbuilder
.error
(nintro
, "Error: the virtual type SELF must be public.")
386 # SELF must not be fixed
387 if intro
.is_fixed
then
388 modelbuilder
.error
(nintro
, "Error: the virtual type SELF cannot be fixed.")
394 # This class introduction inherits a SELF
395 # We insert an artificial property to update it
396 var mpropdef
= new MVirtualTypeDef(self, mprop
, self.location
)
397 mpropdef
.bound
= mclass
.mclass_type
402 # The associated main model entity
403 type MPROPDEF: MPropDef
405 # The associated propdef once build by a `ModelBuilder`
406 var mpropdef
: nullable MPROPDEF is writable
408 private fun build_property
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef) is abstract
409 private fun build_signature
(modelbuilder
: ModelBuilder) is abstract
410 private fun check_signature
(modelbuilder
: ModelBuilder) is abstract
411 private fun new_property_visibility
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef, nvisibility
: nullable AVisibility): MVisibility
413 var mvisibility
= public_visibility
414 if nvisibility
!= null then
415 mvisibility
= nvisibility
.mvisibility
416 if mvisibility
== intrude_visibility
then
417 modelbuilder
.error
(nvisibility
, "Error: intrude is not a legal visibility for properties.")
418 mvisibility
= public_visibility
421 if mclassdef
.mclass
.visibility
== private_visibility
then
422 if mvisibility
== protected_visibility
then
423 assert nvisibility
!= null
424 modelbuilder
.error
(nvisibility
, "Error: The only legal visibility for properties in a private class is private.")
425 else if mvisibility
== private_visibility
then
426 assert nvisibility
!= null
427 modelbuilder
.advice
(nvisibility
, "useless-visibility", "Warning: private is superfluous since the only legal visibility for properties in a private class is private.")
429 mvisibility
= private_visibility
434 private fun set_doc
(mpropdef
: MPropDef, modelbuilder
: ModelBuilder)
436 var ndoc
= self.n_doc
438 var mdoc
= ndoc
.to_mdoc
440 mdoc
.original_mentity
= mpropdef
441 else if mpropdef
.is_intro
and mpropdef
.mproperty
.visibility
>= protected_visibility
then
442 modelbuilder
.advice
(self, "missing-doc", "Documentation warning: Undocumented property `{mpropdef.mproperty}`")
445 var at_deprecated
= get_single_annotation
("deprecated", modelbuilder
)
446 if at_deprecated
!= null then
447 if not mpropdef
.is_intro
then
448 modelbuilder
.error
(self, "Error: method redefinition cannot be deprecated.")
450 var info
= new MDeprecationInfo
451 ndoc
= at_deprecated
.n_doc
452 if ndoc
!= null then info
.mdoc
= ndoc
.to_mdoc
453 mpropdef
.mproperty
.deprecation
= info
458 private fun check_redef_property_visibility
(modelbuilder
: ModelBuilder, nvisibility
: nullable AVisibility, mprop
: MProperty)
460 if nvisibility
== null then return
461 var mvisibility
= nvisibility
.mvisibility
462 if mvisibility
!= mprop
.visibility
and mvisibility
!= public_visibility
then
463 modelbuilder
.error
(nvisibility
, "Error: redefinition changed the visibility from a {mprop.visibility} to a {mvisibility}")
467 private fun check_redef_keyword
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef, kwredef
: nullable Token, need_redef
: Bool, mprop
: MProperty): Bool
469 if mclassdef
.mprop2npropdef
.has_key
(mprop
) then
470 modelbuilder
.error
(self, "Error: A property {mprop} is already defined in class {mclassdef.mclass} at line {mclassdef.mprop2npropdef[mprop].location.line_start}.")
473 if mprop
isa MMethod and mprop
.is_toplevel
!= (parent
isa ATopClassdef) then
474 if mprop
.is_toplevel
then
475 modelbuilder
.error
(self, "Error: {mprop} is a top level method.")
477 modelbuilder
.error
(self, "Error: {mprop} is not a top level method.")
482 if mprop
isa MMethod and mprop
.is_root_init
then return true
483 if kwredef
== null then
485 modelbuilder
.error
(self, "Redef error: {mclassdef.mclass}::{mprop.name} is an inherited property. To redefine it, add the redef keyword.")
489 # Check for full-name conflicts in the project.
490 # A public property should have a unique qualified name `project::class::prop`.
491 if mprop
.intro_mclassdef
.mmodule
.mgroup
!= null and mprop
.visibility
>= protected_visibility
then
492 var others
= modelbuilder
.model
.get_mproperties_by_name
(mprop
.name
)
493 if others
!= null then for other
in others
do
494 if other
!= mprop
and other
.intro_mclassdef
.mmodule
.mgroup
!= null and other
.intro_mclassdef
.mmodule
.mgroup
.mproject
== mprop
.intro_mclassdef
.mmodule
.mgroup
.mproject
and other
.intro_mclassdef
.mclass
.name
== mprop
.intro_mclassdef
.mclass
.name
and other
.visibility
>= protected_visibility
then
495 modelbuilder
.advice
(self, "full-name-conflict", "Warning: A property named `{other.full_name}` is already defined in module `{other.intro_mclassdef.mmodule}` for the class `{other.intro_mclassdef.mclass.name}`.")
501 if not need_redef
then
502 modelbuilder
.error
(self, "Error: No property {mclassdef.mclass}::{mprop.name} is inherited. Remove the redef keyword to define a new property.")
511 redef class ASignature
512 # Is the model builder has correctly visited the signature
513 var is_visited
= false
514 # Names of parameters from the AST
515 # REQUIRE: is_visited
516 var param_names
= new Array[String]
517 # Types of parameters from the AST
518 # REQUIRE: is_visited
519 var param_types
= new Array[MType]
520 # Rank of the vararg (of -1 if none)
521 # REQUIRE: is_visited
522 var vararg_rank
: Int = -1
524 var ret_type
: nullable MType = null
526 # Visit and fill information about a signature
527 private fun visit_signature
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef): Bool
529 var mmodule
= mclassdef
.mmodule
530 var param_names
= self.param_names
531 var param_types
= self.param_types
532 for np
in self.n_params
do
533 param_names
.add
(np
.n_id
.text
)
534 var ntype
= np
.n_type
535 if ntype
!= null then
536 var mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
537 if mtype
== null then return false # Skip error
538 for i
in [0..param_names
.length-param_types
.length
[ do
539 param_types
.add
(mtype
)
541 if np
.n_dotdotdot
!= null then
542 if self.vararg_rank
!= -1 then
543 modelbuilder
.error
(np
, "Error: {param_names[self.vararg_rank]} is already a vararg")
546 self.vararg_rank
= param_names
.length
- 1
551 var ntype
= self.n_type
552 if ntype
!= null then
553 self.ret_type
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
554 if self.ret_type
== null then return false # Skip error
557 self.is_visited
= true
561 # Build a visited signature
562 fun build_signature
(modelbuilder
: ModelBuilder): nullable MSignature
564 if param_names
.length
!= param_types
.length
then
565 # Some parameters are typed, other parameters are not typed.
566 modelbuilder
.error
(self.n_params
[param_types
.length
], "Error: Untyped parameter `{param_names[param_types.length]}'.")
570 var mparameters
= new Array[MParameter]
571 for i
in [0..param_names
.length
[ do
572 var mparameter
= new MParameter(param_names
[i
], param_types
[i
], i
== vararg_rank
)
573 self.n_params
[i
].mparameter
= mparameter
574 mparameters
.add
(mparameter
)
577 var msignature
= new MSignature(mparameters
, ret_type
)
583 # The associated mparameter if any
584 var mparameter
: nullable MParameter = null
587 redef class AMethPropdef
588 redef type MPROPDEF: MMethodDef
591 # Can self be used as a root init?
592 private fun look_like_a_root_init
(modelbuilder
: ModelBuilder, mclassdef
: MClassDef): Bool
594 # Need the `init` keyword
595 if n_kwinit
== null then return false
596 # Need to by anonymous
597 if self.n_methid
!= null then return false
598 # No annotation on itself
599 if get_single_annotation
("old_style_init", modelbuilder
) != null then return false
601 var amod
= self.parent
.parent
.as(AModule)
602 var amoddecl
= amod
.n_moduledecl
603 if amoddecl
!= null then
604 var old
= amoddecl
.get_single_annotation
("old_style_init", modelbuilder
)
605 if old
!= null then return false
608 if self.n_signature
.n_params
.length
> 0 then
609 modelbuilder
.advice
(self, "old-init", "Warning: init with signature in {mclassdef}")
612 # Cannot be private or something
613 if not self.n_visibility
isa APublicVisibility then
614 modelbuilder
.advice
(self, "old-init", "Warning: non-public init in {mclassdef}")
621 redef fun build_property
(modelbuilder
, mclassdef
)
623 var n_kwinit
= n_kwinit
624 var n_kwnew
= n_kwnew
625 var is_init
= n_kwinit
!= null or n_kwnew
!= null
627 var amethodid
= self.n_methid
629 if amethodid
== null then
633 else if n_kwinit
!= null then
636 else if n_kwnew
!= null then
642 else if amethodid
isa AIdMethid then
643 name
= amethodid
.n_id
.text
644 name_node
= amethodid
646 # operator, bracket or assign
647 name
= amethodid
.collect_text
648 name_node
= amethodid
650 if name
== "-" and self.n_signature
.n_params
.length
== 0 then
655 var look_like_a_root_init
= look_like_a_root_init
(modelbuilder
, mclassdef
)
656 var mprop
: nullable MMethod = null
657 if not is_init
or n_kwredef
!= null then mprop
= modelbuilder
.try_get_mproperty_by_name
(name_node
, mclassdef
, name
).as(nullable MMethod)
658 if mprop
== null and look_like_a_root_init
then
659 mprop
= modelbuilder
.the_root_init_mmethod
661 if nb
isa ABlockExpr and nb
.n_expr
.is_empty
and n_doc
== null then
662 modelbuilder
.advice
(self, "useless-init", "Warning: useless empty init in {mclassdef}")
665 if mprop
== null then
666 var mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, self.n_visibility
)
667 mprop
= new MMethod(mclassdef
, name
, mvisibility
)
668 if look_like_a_root_init
and modelbuilder
.the_root_init_mmethod
== null then
669 modelbuilder
.the_root_init_mmethod
= mprop
670 mprop
.is_root_init
= true
672 mprop
.is_init
= is_init
673 mprop
.is_new
= n_kwnew
!= null
674 if parent
isa ATopClassdef then mprop
.is_toplevel
= true
675 self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, false, mprop
)
677 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, not self isa AMainMethPropdef, mprop
) then return
678 check_redef_property_visibility
(modelbuilder
, self.n_visibility
, mprop
)
681 # Check name conflicts in the local class for constructors.
683 for p
, n
in mclassdef
.mprop2npropdef
do
684 if p
!= mprop
and p
isa MMethod and p
.name
== name
then
685 check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, false, p
)
691 mclassdef
.mprop2npropdef
[mprop
] = self
693 var mpropdef
= new MMethodDef(mclassdef
, mprop
, self.location
)
695 set_doc
(mpropdef
, modelbuilder
)
697 self.mpropdef
= mpropdef
698 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
699 if mpropdef
.is_intro
then
700 modelbuilder
.toolcontext
.info
("{mpropdef} introduces new method {mprop.full_name}", 4)
702 modelbuilder
.toolcontext
.info
("{mpropdef} redefines method {mprop.full_name}", 4)
706 redef fun build_signature
(modelbuilder
)
708 var mpropdef
= self.mpropdef
709 if mpropdef
== null then return # Error thus skiped
710 var mclassdef
= mpropdef
.mclassdef
711 var mmodule
= mclassdef
.mmodule
712 var nsig
= self.n_signature
714 if mpropdef
.mproperty
.is_root_init
and not mclassdef
.is_intro
then
715 var root_init
= mclassdef
.mclass
.root_init
716 if root_init
!= null then
717 # Inherit the initializers by refinement
718 mpropdef
.new_msignature
= root_init
.new_msignature
719 assert mpropdef
.initializers
.is_empty
720 mpropdef
.initializers
.add_all root_init
.initializers
724 # Retrieve info from the signature AST
725 var param_names
= new Array[String] # Names of parameters from the AST
726 var param_types
= new Array[MType] # Types of parameters from the AST
728 var ret_type
: nullable MType = null # Return type from the AST
730 if not nsig
.visit_signature
(modelbuilder
, mclassdef
) then return
731 param_names
= nsig
.param_names
732 param_types
= nsig
.param_types
733 vararg_rank
= nsig
.vararg_rank
734 ret_type
= nsig
.ret_type
737 # Look for some signature to inherit
738 # FIXME: do not inherit from the intro, but from the most specific
739 var msignature
: nullable MSignature = null
740 if not mpropdef
.is_intro
then
741 msignature
= mpropdef
.mproperty
.intro
.msignature
742 if msignature
== null then return # Skip error
744 # The local signature is adapted to use the local formal types, if any.
745 msignature
= msignature
.resolve_for
(mclassdef
.mclass
.mclass_type
, mclassdef
.bound_mtype
, mmodule
, false)
747 # Check inherited signature arity
748 if param_names
.length
!= msignature
.arity
then
750 if nsig
!= null then node
= nsig
else node
= self
751 modelbuilder
.error
(node
, "Redef error: {mpropdef} redefines {mpropdef.mproperty.intro} with {param_names.length} parameter(s), {msignature.arity} expected. Signature is {mpropdef}{msignature}")
754 else if mpropdef
.mproperty
.is_init
and not mpropdef
.mproperty
.is_new
then
755 # FIXME UGLY: inherit signature from a super-constructor
756 for msupertype
in mclassdef
.supertypes
do
757 msupertype
= msupertype
.anchor_to
(mmodule
, mclassdef
.bound_mtype
)
758 var candidate
= modelbuilder
.try_get_mproperty_by_name2
(self, mmodule
, msupertype
, mpropdef
.mproperty
.name
)
759 if candidate
!= null then
760 if msignature
== null then
761 msignature
= candidate
.intro
.as(MMethodDef).msignature
768 # Inherit the signature
769 if msignature
!= null and param_names
.length
!= param_types
.length
and param_names
.length
== msignature
.arity
and param_types
.length
== 0 then
770 # Parameters are untyped, thus inherit them
771 param_types
= new Array[MType]
772 for mparameter
in msignature
.mparameters
do
773 param_types
.add
(mparameter
.mtype
)
775 vararg_rank
= msignature
.vararg_rank
777 if msignature
!= null and ret_type
== null then
778 ret_type
= msignature
.return_mtype
781 if param_names
.length
!= param_types
.length
then
782 # Some parameters are typed, other parameters are not typed.
783 modelbuilder
.error
(nsig
.n_params
[param_types
.length
], "Error: Untyped parameter `{param_names[param_types.length]}'.")
787 var mparameters
= new Array[MParameter]
788 for i
in [0..param_names
.length
[ do
789 var mparameter
= new MParameter(param_names
[i
], param_types
[i
], i
== vararg_rank
)
790 if nsig
!= null then nsig
.n_params
[i
].mparameter
= mparameter
791 mparameters
.add
(mparameter
)
794 # In `new`-factories, the return type is by default the classtype.
795 if ret_type
== null and mpropdef
.mproperty
.is_new
then ret_type
= mclassdef
.mclass
.mclass_type
797 msignature
= new MSignature(mparameters
, ret_type
)
798 mpropdef
.msignature
= msignature
799 mpropdef
.is_abstract
= self.get_single_annotation
("abstract", modelbuilder
) != null
800 mpropdef
.is_intern
= self.get_single_annotation
("intern", modelbuilder
) != null
801 mpropdef
.is_extern
= self.n_extern_code_block
!= null or self.get_single_annotation
("extern", modelbuilder
) != null
804 redef fun check_signature
(modelbuilder
)
806 var mpropdef
= self.mpropdef
807 if mpropdef
== null then return # Error thus skiped
808 var mclassdef
= mpropdef
.mclassdef
809 var mmodule
= mclassdef
.mmodule
810 var nsig
= self.n_signature
811 var mysignature
= self.mpropdef
.msignature
812 if mysignature
== null then return # Error thus skiped
814 # Lookup for signature in the precursor
815 # FIXME all precursors should be considered
816 if not mpropdef
.is_intro
then
817 var msignature
= mpropdef
.mproperty
.intro
.msignature
818 if msignature
== null then return
820 var precursor_ret_type
= msignature
.return_mtype
821 var ret_type
= mysignature
.return_mtype
822 if ret_type
!= null and precursor_ret_type
== null then
823 modelbuilder
.error
(nsig
.n_type
.as(not null), "Redef Error: {mpropdef.mproperty} is a procedure, not a function.")
827 if mysignature
.arity
> 0 then
828 # Check parameters types
829 for i
in [0..mysignature
.arity
[ do
830 var myt
= mysignature
.mparameters
[i
].mtype
831 var prt
= msignature
.mparameters
[i
].mtype
832 if not myt
.is_subtype
(mmodule
, mclassdef
.bound_mtype
, prt
) or
833 not prt
.is_subtype
(mmodule
, mclassdef
.bound_mtype
, myt
) then
834 modelbuilder
.error
(nsig
.n_params
[i
], "Redef Error: Wrong type for parameter `{mysignature.mparameters[i].name}'. found {myt}, expected {prt} as in {mpropdef.mproperty.intro}.")
838 if precursor_ret_type
!= null then
839 if ret_type
== null then
840 # Inherit the return type
841 ret_type
= precursor_ret_type
842 else if not ret_type
.is_subtype
(mmodule
, mclassdef
.bound_mtype
, precursor_ret_type
) then
843 modelbuilder
.error
(nsig
.n_type
.as(not null), "Redef Error: Wrong return type. found {ret_type}, expected {precursor_ret_type} as in {mpropdef.mproperty.intro}.")
848 if mysignature
.arity
> 0 then
849 # Check parameters visibility
850 for i
in [0..mysignature
.arity
[ do
851 var nt
= nsig
.n_params
[i
].n_type
852 if nt
!= null then modelbuilder
.check_visibility
(nt
, nt
.mtype
.as(not null), mpropdef
)
855 if nt
!= null then modelbuilder
.check_visibility
(nt
, nt
.mtype
.as(not null), mpropdef
)
860 redef class AAttrPropdef
861 redef type MPROPDEF: MAttributeDef
863 # Is the node tagged `noinit`?
866 # Is the node tagged lazy?
869 # Has the node a default value?
870 # Could be through `n_expr` or `n_block`
871 var has_value
= false
873 # The guard associated to a lazy attribute.
874 # Because some engines does not have a working `isset`,
875 # this additional attribute is used to guard the lazy initialization.
876 # TODO: to remove once isset is correctly implemented
877 var mlazypropdef
: nullable MAttributeDef
879 # The associated getter (read accessor) if any
880 var mreadpropdef
: nullable MMethodDef is writable
881 # The associated setter (write accessor) if any
882 var mwritepropdef
: nullable MMethodDef is writable
884 redef fun build_property
(modelbuilder
, mclassdef
)
886 var mclass
= mclassdef
.mclass
889 name
= self.n_id2
.text
891 if mclass
.kind
== interface_kind
or mclassdef
.mclass
.kind
== enum_kind
then
892 modelbuilder
.error
(self, "Error: Attempt to define attribute {name} in the interface {mclass}.")
893 else if mclass
.kind
== enum_kind
then
894 modelbuilder
.error
(self, "Error: Attempt to define attribute {name} in the enum class {mclass}.")
895 else if mclass
.kind
== extern_kind
then
896 modelbuilder
.error
(self, "Error: Attempt to define attribute {name} in the extern class {mclass}.")
899 # New attribute style
900 var nid2
= self.n_id2
901 var mprop
= new MAttribute(mclassdef
, "_" + name
, private_visibility
)
902 var mpropdef
= new MAttributeDef(mclassdef
, mprop
, self.location
)
903 self.mpropdef
= mpropdef
904 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
907 var mreadprop
= modelbuilder
.try_get_mproperty_by_name
(nid2
, mclassdef
, readname
).as(nullable MMethod)
908 if mreadprop
== null then
909 var mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, self.n_visibility
)
910 mreadprop
= new MMethod(mclassdef
, readname
, mvisibility
)
911 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, false, mreadprop
) then return
912 mreadprop
.deprecation
= mprop
.deprecation
914 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, n_kwredef
, true, mreadprop
) then return
915 check_redef_property_visibility
(modelbuilder
, self.n_visibility
, mreadprop
)
917 mclassdef
.mprop2npropdef
[mreadprop
] = self
919 var mreadpropdef
= new MMethodDef(mclassdef
, mreadprop
, self.location
)
920 self.mreadpropdef
= mreadpropdef
921 modelbuilder
.mpropdef2npropdef
[mreadpropdef
] = self
922 set_doc
(mreadpropdef
, modelbuilder
)
923 mpropdef
.mdoc
= mreadpropdef
.mdoc
925 has_value
= n_expr
!= null or n_block
!= null
927 var atnoinit
= self.get_single_annotation
("noinit", modelbuilder
)
928 if atnoinit
!= null then
931 modelbuilder
.error
(atnoinit
, "Error: `noinit` attributes cannot have an initial value")
936 var atlazy
= self.get_single_annotation
("lazy", modelbuilder
)
937 var atautoinit
= self.get_single_annotation
("autoinit", modelbuilder
)
938 if atlazy
!= null or atautoinit
!= null then
939 if atlazy
!= null and atautoinit
!= null then
940 modelbuilder
.error
(atlazy
, "Error: lazy incompatible with autoinit")
943 if not has_value
then
944 if atlazy
!= null then
945 modelbuilder
.error
(atlazy
, "Error: a lazy attribute needs a value")
946 else if atautoinit
!= null then
947 modelbuilder
.error
(atautoinit
, "Error: a autoinit attribute needs a value")
952 var mlazyprop
= new MAttribute(mclassdef
, "lazy _" + name
, none_visibility
)
953 var mlazypropdef
= new MAttributeDef(mclassdef
, mlazyprop
, self.location
)
954 self.mlazypropdef
= mlazypropdef
957 var atreadonly
= self.get_single_annotation
("readonly", modelbuilder
)
958 if atreadonly
!= null then
959 if not has_value
then
960 modelbuilder
.error
(atreadonly
, "Error: a readonly attribute needs a value")
962 # No setter, so just leave
966 var writename
= name
+ "="
967 var atwritable
= self.get_single_annotation
("writable", modelbuilder
)
968 if atwritable
!= null then
969 if not atwritable
.n_args
.is_empty
then
970 writename
= atwritable
.arg_as_id
(modelbuilder
) or else writename
973 var mwriteprop
= modelbuilder
.try_get_mproperty_by_name
(nid2
, mclassdef
, writename
).as(nullable MMethod)
974 var nwkwredef
: nullable Token = null
975 if atwritable
!= null then nwkwredef
= atwritable
.n_kwredef
976 if mwriteprop
== null then
978 if atwritable
!= null then
979 mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, atwritable
.n_visibility
)
981 mvisibility
= private_visibility
983 mwriteprop
= new MMethod(mclassdef
, writename
, mvisibility
)
984 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, nwkwredef
, false, mwriteprop
) then return
985 mwriteprop
.deprecation
= mprop
.deprecation
987 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, nwkwredef
or else n_kwredef
, true, mwriteprop
) then return
988 if atwritable
!= null then
989 check_redef_property_visibility
(modelbuilder
, atwritable
.n_visibility
, mwriteprop
)
992 mclassdef
.mprop2npropdef
[mwriteprop
] = self
994 var mwritepropdef
= new MMethodDef(mclassdef
, mwriteprop
, self.location
)
995 self.mwritepropdef
= mwritepropdef
996 modelbuilder
.mpropdef2npropdef
[mwritepropdef
] = self
997 mwritepropdef
.mdoc
= mpropdef
.mdoc
1000 redef fun build_signature
(modelbuilder
)
1002 var mpropdef
= self.mpropdef
1003 if mpropdef
== null then return # Error thus skipped
1004 var mclassdef
= mpropdef
.mclassdef
1005 var mmodule
= mclassdef
.mmodule
1006 var mtype
: nullable MType = null
1008 var mreadpropdef
= self.mreadpropdef
1010 var ntype
= self.n_type
1011 if ntype
!= null then
1012 mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
1013 if mtype
== null then return
1016 var inherited_type
: nullable MType = null
1017 # Inherit the type from the getter (usually an abstract getter)
1018 if mreadpropdef
!= null and not mreadpropdef
.is_intro
then
1019 var msignature
= mreadpropdef
.mproperty
.intro
.msignature
1020 if msignature
== null then return # Error, thus skipped
1021 inherited_type
= msignature
.return_mtype
1022 if inherited_type
!= null then
1023 # The inherited type is adapted to use the local formal types, if any.
1024 inherited_type
= inherited_type
.resolve_for
(mclassdef
.mclass
.mclass_type
, mclassdef
.bound_mtype
, mmodule
, false)
1025 if mtype
== null then mtype
= inherited_type
1029 var nexpr
= self.n_expr
1030 if mtype
== null then
1031 if nexpr
!= null then
1032 if nexpr
isa ANewExpr then
1033 mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, nexpr
.n_type
)
1034 else if nexpr
isa AIntExpr then
1035 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Int")
1036 if cla
!= null then mtype
= cla
.mclass_type
1037 else if nexpr
isa AFloatExpr then
1038 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Float")
1039 if cla
!= null then mtype
= cla
.mclass_type
1040 else if nexpr
isa ACharExpr then
1041 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Char")
1042 if cla
!= null then mtype
= cla
.mclass_type
1043 else if nexpr
isa ABoolExpr then
1044 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "Bool")
1045 if cla
!= null then mtype
= cla
.mclass_type
1046 else if nexpr
isa ASuperstringExpr then
1047 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "String")
1048 if cla
!= null then mtype
= cla
.mclass_type
1049 else if nexpr
isa AStringFormExpr then
1050 var cla
= modelbuilder
.try_get_mclass_by_name
(nexpr
, mmodule
, "String")
1051 if cla
!= null then mtype
= cla
.mclass_type
1053 modelbuilder
.error
(self, "Error: Untyped attribute {mpropdef}. Implicit typing allowed only for literals and new.")
1056 if mtype
== null then return
1058 else if ntype
!= null and inherited_type
== mtype
then
1059 if nexpr
isa ANewExpr then
1060 var xmtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, nexpr
.n_type
)
1061 if xmtype
== mtype
then
1062 modelbuilder
.advice
(ntype
, "useless-type", "Warning: useless type definition")
1067 if mtype
== null then
1068 modelbuilder
.error
(self, "Error: Untyped attribute {mpropdef}")
1072 mpropdef
.static_mtype
= mtype
1074 if mreadpropdef
!= null then
1075 var msignature
= new MSignature(new Array[MParameter], mtype
)
1076 mreadpropdef
.msignature
= msignature
1079 var mwritepropdef
= self.mwritepropdef
1080 if mwritepropdef
!= null then
1083 var mparameter
= new MParameter(name
, mtype
, false)
1084 var msignature
= new MSignature([mparameter
], null)
1085 mwritepropdef
.msignature
= msignature
1088 var mlazypropdef
= self.mlazypropdef
1089 if mlazypropdef
!= null then
1090 mlazypropdef
.static_mtype
= modelbuilder
.model
.get_mclasses_by_name
("Bool").first
.mclass_type
1094 redef fun check_signature
(modelbuilder
)
1096 var mpropdef
= self.mpropdef
1097 if mpropdef
== null then return # Error thus skipped
1098 var ntype
= self.n_type
1099 var mtype
= self.mpropdef
.static_mtype
1100 if mtype
== null then return # Error thus skipped
1102 # Lookup for signature in the precursor
1103 # FIXME all precursors should be considered
1104 if not mpropdef
.is_intro
then
1105 var precursor_type
= mpropdef
.mproperty
.intro
.static_mtype
1106 if precursor_type
== null then return
1108 if mtype
!= precursor_type
then
1109 modelbuilder
.error
(ntype
.as(not null), "Redef Error: Wrong static type. found {mtype}, expected {precursor_type}.")
1114 # Check getter and setter
1115 var meth
= self.mreadpropdef
1116 if meth
!= null then
1117 self.check_method_signature
(modelbuilder
, meth
)
1118 var node
: nullable ANode = ntype
1119 if node
== null then node
= self
1120 modelbuilder
.check_visibility
(node
, mtype
, meth
)
1122 meth
= self.mwritepropdef
1123 if meth
!= null then
1124 self.check_method_signature
(modelbuilder
, meth
)
1125 var node
: nullable ANode = ntype
1126 if node
== null then node
= self
1127 modelbuilder
.check_visibility
(node
, mtype
, meth
)
1131 private fun check_method_signature
(modelbuilder
: ModelBuilder, mpropdef
: MMethodDef)
1133 var mclassdef
= mpropdef
.mclassdef
1134 var mmodule
= mclassdef
.mmodule
1135 var nsig
= self.n_type
1136 var mysignature
= mpropdef
.msignature
1137 if mysignature
== null then return # Error thus skiped
1139 # Lookup for signature in the precursor
1140 # FIXME all precursors should be considered
1141 if not mpropdef
.is_intro
then
1142 var msignature
= mpropdef
.mproperty
.intro
.msignature
1143 if msignature
== null then return
1145 if mysignature
.arity
!= msignature
.arity
then
1147 if nsig
!= null then node
= nsig
else node
= self
1148 modelbuilder
.error
(node
, "Redef Error: {mysignature.arity} parameters found, {msignature.arity} expected. Signature is {mpropdef}{msignature}")
1151 var precursor_ret_type
= msignature
.return_mtype
1152 var ret_type
= mysignature
.return_mtype
1153 if ret_type
!= null and precursor_ret_type
== null then
1155 if nsig
!= null then node
= nsig
else node
= self
1156 modelbuilder
.error
(node
, "Redef Error: {mpropdef.mproperty} is a procedure, not a function.")
1160 if mysignature
.arity
> 0 then
1161 # Check parameters types
1162 for i
in [0..mysignature
.arity
[ do
1163 var myt
= mysignature
.mparameters
[i
].mtype
1164 var prt
= msignature
.mparameters
[i
].mtype
1165 if not myt
.is_subtype
(mmodule
, mclassdef
.bound_mtype
, prt
) or
1166 not prt
.is_subtype
(mmodule
, mclassdef
.bound_mtype
, myt
) then
1168 if nsig
!= null then node
= nsig
else node
= self
1169 modelbuilder
.error
(node
, "Redef Error: Wrong type for parameter `{mysignature.mparameters[i].name}'. found {myt}, expected {prt}.")
1173 if precursor_ret_type
!= null then
1174 if ret_type
== null then
1175 # Inherit the return type
1176 ret_type
= precursor_ret_type
1177 else if not ret_type
.is_subtype
(mmodule
, mclassdef
.bound_mtype
, precursor_ret_type
) then
1179 if nsig
!= null then node
= nsig
else node
= self
1180 modelbuilder
.error
(node
, "Redef Error: Wrong return type. found {ret_type}, expected {precursor_ret_type}.")
1187 redef class ATypePropdef
1188 redef type MPROPDEF: MVirtualTypeDef
1190 redef fun build_property
(modelbuilder
, mclassdef
)
1192 var name
= self.n_id
.text
1193 var mprop
= modelbuilder
.try_get_mproperty_by_name
(self.n_id
, mclassdef
, name
)
1194 if mprop
== null then
1195 var mvisibility
= new_property_visibility
(modelbuilder
, mclassdef
, self.n_visibility
)
1196 mprop
= new MVirtualTypeProp(mclassdef
, name
, mvisibility
)
1197 for c
in name
.chars
do if c
>= 'a' and c
<= 'z' then
1198 modelbuilder
.warning
(n_id
, "bad-type-name", "Warning: lowercase in the virtual type {name}")
1201 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, self.n_kwredef
, false, mprop
) then return
1203 if not self.check_redef_keyword
(modelbuilder
, mclassdef
, self.n_kwredef
, true, mprop
) then return
1204 assert mprop
isa MVirtualTypeProp
1205 check_redef_property_visibility
(modelbuilder
, self.n_visibility
, mprop
)
1207 mclassdef
.mprop2npropdef
[mprop
] = self
1209 var mpropdef
= new MVirtualTypeDef(mclassdef
, mprop
, self.location
)
1210 self.mpropdef
= mpropdef
1211 modelbuilder
.mpropdef2npropdef
[mpropdef
] = self
1212 if mpropdef
.is_intro
then
1213 modelbuilder
.toolcontext
.info
("{mpropdef} introduces new type {mprop.full_name}", 4)
1215 modelbuilder
.toolcontext
.info
("{mpropdef} redefines type {mprop.full_name}", 4)
1217 set_doc
(mpropdef
, modelbuilder
)
1219 var atfixed
= get_single_annotation
("fixed", modelbuilder
)
1220 if atfixed
!= null then
1221 mpropdef
.is_fixed
= true
1225 redef fun build_signature
(modelbuilder
)
1227 var mpropdef
= self.mpropdef
1228 if mpropdef
== null then return # Error thus skipped
1229 var mclassdef
= mpropdef
.mclassdef
1230 var mmodule
= mclassdef
.mmodule
1231 var mtype
: nullable MType = null
1233 var ntype
= self.n_type
1234 mtype
= modelbuilder
.resolve_mtype
(mmodule
, mclassdef
, ntype
)
1235 if mtype
== null then return
1237 mpropdef
.bound
= mtype
1238 # print "{mpropdef}: {mtype}"
1241 redef fun check_signature
(modelbuilder
)
1243 var mpropdef
= self.mpropdef
1244 if mpropdef
== null then return # Error thus skipped
1246 var bound
= self.mpropdef
.bound
1247 if bound
== null then return # Error thus skipped
1249 modelbuilder
.check_visibility
(n_type
, bound
, mpropdef
)
1251 var mclassdef
= mpropdef
.mclassdef
1252 var mmodule
= mclassdef
.mmodule
1253 var anchor
= mclassdef
.bound_mtype
1256 if bound
isa MVirtualType then
1257 # Slow case: progress on each resolution until: (i) we loop, or (ii) we found a non formal type
1258 var seen
= [self.mpropdef
.mproperty
.mvirtualtype
]
1260 if seen
.has
(bound
) then
1262 modelbuilder
.error
(self, "Error: circularity of virtual type definition: {seen.join(" -> ")}")
1266 var next
= bound
.lookup_bound
(mmodule
, anchor
)
1267 if not next
isa MVirtualType then break
1272 # Check redefinitions
1273 bound
= mpropdef
.bound
.as(not null)
1274 for p
in mpropdef
.mproperty
.lookup_super_definitions
(mmodule
, anchor
) do
1275 var supbound
= p
.bound
1276 if supbound
== null then break # broken super bound, skip error
1278 modelbuilder
.error
(self, "Redef Error: Virtual type {mpropdef.mproperty} is fixed in super-class {p.mclassdef.mclass}")
1281 if p
.mclassdef
.mclass
== mclassdef
.mclass
then
1282 # Still a warning to pass existing bad code
1283 modelbuilder
.warning
(n_type
, "refine-type", "Redef Error: a virtual type cannot be refined.")
1286 if not bound
.is_subtype
(mmodule
, anchor
, supbound
) then
1287 modelbuilder
.error
(n_type
, "Redef Error: Wrong bound type. Found {bound}, expected a subtype of {supbound}, as in {p}.")